sys/src/lib9p/fid.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <auth.h>
   4 #include <fcall.h>
   5 #include <thread.h>
   6 #include "9p.h"
   7
   8 static void
   9 incfidref(void *v)
  10 {
  11         Fid *f;
  12
  13         f = v;
  14         if(f)
  15                 incref(&f->ref);
  16 }
  17
  18 Fidpool*
  19 allocfidpool(void (*destroy)(Fid*))
  20 {
  21         Fidpool *f;
  22
  23         f = emalloc9p(sizeof *f);
  24         f->map = allocmap(incfidref);
  25         f->destroy = destroy;
  26         return f;
  27 }
  28
  29 void
  30 freefidpool(Fidpool *p)
  31 {
  32         freemap(p->map, (void(*)(void*))p->destroy);
  33         free(p);
  34 }
  35
  36 Fid*
  37 allocfid(Fidpool *pool, ulong fid)
  38 {
  39         Fid *f;
  40
  41         f = emalloc9p(sizeof *f);
  42         f->fid = fid;
  43         f->omode = -1;
  44         f->pool = pool;
  45
  46         incfidref(f);
  47         incfidref(f);
  48         if(caninsertkey(pool->map, fid, f) == 0){
  49                 closefid(f);
  50                 closefid(f);
  51                 return nil;
  52         }
  53
  54         return f;
  55 }
  56
  57 Fid*
  58 lookupfid(Fidpool *pool, ulong fid)
  59 {
  60         return lookupkey(pool->map, fid);
  61 }
  62
  63 void
  64 closefid(Fid *f)
  65 {
  66         if(decref(&f->ref) == 0) {
  67                 if(f->rdir)
  68                         closedirfile(f->rdir);
  69                 if(f->pool->destroy)
  70                         f->pool->destroy(f);
  71                 if(f->file)
  72                         closefile(f->file);
  73                 free(f->uid);
  74                 free(f);
  75         }
  76 }
  77
  78 Fid*
  79 removefid(Fidpool *pool, ulong fid)
  80 {
  81         return deletekey(pool->map, fid);
  82 }